Spring coiling machine



Oct. 22, 1935.

J. GOGAN SPRING COILING MACHINE Filed Feb. 23, 1934 5 Sheets-Sheet 1rrakwsYs Oct. 22, 1935, J GOGAN SPRING COILING Mmmm Filed Feb'. 25, 19 5sheds-sheet 2 Oct. 22, 1935. J. GoGAN I2,018,209

I SPRING COILING MACHINE Filed Feb. 23, -1934 5 Sheets-Sheet 5 rraeNe-YsOct. 22, 1935. Y J. GOGAN 2,018,209

SPRING COILING MACHINE Filed Feb. 25, 1934 5 Sheets-Sheet 4 4i-TORNEI YS@at 22, E935, J. GOGAN M8209 SPRING COILING MACHINE Filed Feb. 23, 19345 SlleeS--Sheel'l 5 y?? .ih/VEN roe: Josep/J 6o @A N Patented Oct. 22,1935 UNITED As'rxnss PATENT OFFICE SPRING COILING MACHINE Joseph Gogan,Lakewood, Ohio Application February 23, 1934, Serial No. 712,599 10Claims. (Cl. 153-67) The present invention relates to machines formaking springs, and mo-re particularly production machines for makingrelatively heavy coil springs of the helical type, such as those nowbeing employed in automobile suspensions.

An object of the invention is the provision of a novel ceiling machinewhich will be rugged and simple in construction, inexpensive tomanufacture, andsemi-automatic in operation.

Another object of the invention is the pro- Vision of a novel machinefor making coil springs, particularly adapted to high productionpurposes, wherein a predetermined length of rod stock is coiled about amandrel with the free ends thereof lying close to the adjacentconvolutions.

Another object of the invention is the provision of a novel machine formaking coil springs from hot rod stock, by coiling the stock about amandrel while the free end thereof is advanced longitudinally of themandrel, and subsequently stripping the finished spring from themandrel.

Further objects and advantages of the invention will be apparent tothose skilled in the art to which it pertains from the followingdescription of the preferred embodiment thereof, described withreference to the accompanying drawings, in which Fig. 1 is a frontperspective of a coil spring machine embodying the present inventionfFig. 2 is a longitudinal section through the center of the machine onthe line 2-2 of Fig. 3, with portions shown in elevation.

Fig. 3 is a section on the line 3-3 of Figs. 2 and 4, with portionsshown in elevation;

Fig. 4 is a top plan view of the mechanism shown in Fig. 3;

Fig. 5 is a longitudinal section through the feed screw on the line 5 5of Fig. 3;

Fig. 6 is an enlarged section of the chuck shown in Fig. 2;

Fig. '7 is an enlarged view of a portion of Fig. l;

Fig. 8 is a section on the line 8--8 of Fig. '7;

Fig. 9 is a perspective View of the finished spring;

Fig. 10 is a wiring diagram of the electrical circuits of the machine;

Fig. 11 is a longitudinal section through the limit switch shown in Fig.1, and

Fig. l2 is a section on the line |2--l2 of Fig. 11.

Similar reference characters designate corre- .sponding parts throughthe several views of the drawings.

The preferred embodiment of the invention illustrated and describedherein is a machine for making relatively heavy coil springs, such asthose used in the front suspensionof automobiles, from a predeterminedlength of hot rod stock. It

is to be understood that such variations in the construction of themachine hereinafter de- 5 scribed, as come within the knowledge of thoseskilled in the art, are within the. scope of this invention, and thatthe machine shown is merely illustrative thereof.

Referring to Fig. 1, the frame of the machine 10- illustrated isdesignated in general by the reference character A, and comprises a bedI 0, supported on legs Il, l2 and i3, and an overhead member lllsupported on the bed lil by brackets l5 and I6. The work Win the form ofa predcl5 termined length of hot rod stock, both ends of which are.tapered as illustrated, is placed in the machine by an operative fromthe front, underneath a lead screw 20, with the front end of the rodresting upon a mandrel 2| underneath a 20 clamping bar 22 of a chuckdesignated in general by the reference character C. The clamp bar 22 isthen actuated to clamp the'end of the work W to the mandrel. The chuck Cis carried by and forms part of a spindle designated in gen- 25 eral bythe reference character B, and after the end of the work is clamped tothe mandrel, the spindle B, including the mandrel 2|, is rotated bymechanism hereinafter referred to, to coil the work or rod stock aboutthe mandrel. During the 3o coiling operation the free end of the work orrod is prevented from rotating with the spindle and fed longitudinallyof the mandrel by the lead screw 20, rotated at a speed proportional tothe speed of the spindle. After the free end of the 35 work or rod stockleaves the lead screw 20 it is rolled down against the mandrel 2l by aroller 24, after which the mandrel 2l is withdrawn and the springallowed to drop through the bottom of the machine.

The spindle B comprises a spindle shaft 26, driven from an electricmotor 21, vthrough a gear reduction designated in general at 28, and thespur gears 29 and 30. The spur gear 30 is operatively connected to thespindle shaft 26 by a fric- 45 tion or slip clutch E, tol prevent injuryto the motor in the event that the machine becomes jammed, etc. Thefriction clutch E is of conventional construction and comprises anannular flange 3| on the gear 30 engaged between the 50 plates 32 and 33connected to the spindle shaft 26. Plate 32 is held in engagement withthe other plate 33 by compression springs 34, the pressure of which maybe adjusted to change the load at which the clutch will slip. Thespindle shaft 26 55l phere VVwhen the pedal is depressed. The fluidYpressure'supply line is designated by the referis rotatably supported inbrackets 38 and 39, bolted or otherwise secured to the bed |0. A handwheel 4| xed to the spindle shaft 26 is provided for the purpose ofmanually turning over the spindle.

The chuck C comprises a body portion 42, secured to the spindle shaft 26Yby means of bolts 43, and is preferably keyed to the shaft to preventany rotation between the parts. The clamp bar 22 pivotally supported inthe body portion 42 by a pin y44 carries a lever 45 pivotally connectedto the rear end thereof and provided with a roller 46 at the lower orfree end adapted to roll onra surface 41 formed on the body portion 42.The lower end of the lever is cylindrical and flts in a rectangularopening 49 in the enlarged end 50 of a rod 5| slidably supported in alongitudinal Yaperture in the spindle shaft 26. Longitudinalreciprocation ofthe rod 5| moves the roller 46 over the surface 41 andcauses the clamping bar 22 to engage or disengage the Work, dependingupon the direction of reciprocation.

i The rod 5| is reciprocated longitudinally to cause the clamp bar 22 toengage and disengage the Work by a bar 55, projecting through anaperture in the rod 5| and an elongated slot 56 in the spindle shaft 26.The bar is connected to lugs 51 formed integral with an annular member58, by pins 59. The annular member 58 is rotatably supported on thespindle shaft 26, and is reciprocated longitudinally thereof by a secondannular member 60 supported coaxial therewith. The annular member 58 isadapted to be rotated within the second annular member 60, and the twomembers are held in assembled relationship by a disk 62 bolted to theannular member 58. Anti- `friction. thrust bearings V63 are interposedbetween the members 58 and 60.

The member 60 is provided on opposite sides thereof with projections 65provided with rollers 66 `which engage in slots 61 formed in the upperends of levers 68. The levers 68 are fixed to a horizontal shaft 10rotatably supported in bosses 1| secured to the bed I0; A lever 12 xedto the shaft 10 midway between the lever 68 is operatively connected tothe piston rod 14 of a uid pressure operated motor designated, ingeneral, by the reference character H, by a link 15. The fluid pressureactuatedmotor H comprises' a cylinder 16 secured to a bracket 11 carriedby the bed |0, and acylinder head' 18. A piston Y slidably supported inthe cylinder 16 and connected to the piston rod 14 by a nut 8| isadapted to be reciprocated towards the right, as viewed in Fig."1, byfluid pressure, preferably air, admitted to the cylinder at the left ofthe piston Vthrough a port 83.' The piston 80 is continuously urgedtoward the left, as viewed in the above mentioned figure, by acompression spring 84 surrounding the piston rod 14 and compressedbetween the Vpiston 80 and the lower end of an Vaperture 85 formed inthe bracket 11.. The supply of uid pressure to the vcylinder' 16 iscontrolledV by a foot operated Vvalve 86, which connects a pipe 81communicating with the port 83 `and the valve 86 with fluid pressurewhen the pedal 88 is released, and with exhaust or atmosence character89. The valve 86 is of conventional construction and a detaileddescription thereof 'is Vwconsidered unnecessary to theY full YVunderstanding 'of the present invention.

VThe'mandrel 2| is secured to a member 90 ro-L tatably supported inV abracket'9l slidably sup- Vthe member 90 and the bracket 9|. The mandrel2| is provided with a squared end 94 adapted to 5 project through arectangular aperture in a face plate of the chuck C. The plate 95 issecured to the body portion 42 of the chuck by bolts 96 and the mandrel2| is driven from the spindle shaft 20 through the chuck. The mandrel 2|is 10 also provided with a longitudinal passage 91 through which air isblown for the purpose of cooling the mandrel. The air connection is madeby means of a pipe 98.

'Ihe bracket 9| is reciprocated on the ways 92 to 15 engage anddisengage the squared end 94 of thel mandrel 2| with the chuck C, by adouble acting Vfluid pressure actuated motor designated in general bythe reference character J. The motor comprises a double acting piston|00 attached 20 to a piston rod |0| and slidably supported within acylinder |02 xed to the overhead member I4 by brackets |03 and |04. Thepiston rod |0| is secured to aplate |05 attached to the bracket 9| byscrews |06. The left hand end of the cylin- 25 der |02 is provided withcushion means for limiting the movement of the piston, etc., towards theleft, as viewed in Fig. 2, and taking the impact thereof. The cushionmeans referred to comprises a member ||0, positioned in the cylin- 3.0der |02 adjacent the cylinder head and pro'- vided with a counterbore||2 within which a compression spring i3 is positioned. The spring H3engages a disk-shaped `member ||4 slidably supported in the cylinder |02which, in turn, en- 35 gages a cup-shaped member ||5 adapted kto engagethe piston |00 when the same is at or near the left hand end of ltsstroke. The movement of the disk-shaped member ||4 and the cupshapedmember ||5 towards the right is limited ci by a rod 6, secured to thecylinder head provided with an enlarged head ||1 positioned within thecup-shaped Lmember 5. The rod ||6 extends through the center of themembers ||4 and ||5 which are free to slide thereon.

The supply of fluid pressure, preferably air, to the motor J iscontrolled by a foot actuated valve |20. A pipe |2| communicatesV withthe valve |20 and the left hand end of the cylinder |02, and a pipe |23communica-tes with the valve |20 50- and a port |24 in the right handend of the cylinder |02. When the foot pedal |25 of the valve |20 isdepressed, the pipe |2| is connected to the bracket 9| etc., is moved tothe right. When the foot pedal |25 is released the direction of the iiowof fluid in the pipes |2| and |23 is reversed,

moving the bracket 9| etc. to the left.

As was previously stated, aV feed screw 20 pretil)r Y,vente the free endof the work W from rotating with the spindle B and feeds the samelongitudi nally of the mandrel 2|. The feed screw 20`is provided with aYhelical groove |25 in the nature of a thread within which the work W isheld, 6'5 and is driven at a predetermined speed in a direc- Y. tionopposite to that of the spindle B Vthrough gears |26 and |21, the formerof which is fixed to the body portion 42 of the chuck C and the latterto a stud `shaft |28 rotatably supported in 750 a bracket |29. VThe lefthand end of the feed screw, see Fig. 5, is secured to a disk |30 bymeans of a bolt |3|, and the disk |30 is detachby'screws |36. The disks|30 and `|35 have a 751 tongue and groove connection which prevents anyrelative rotation between the same.

The right hand end of the feed screw 20 is slidably keyed to an annularmember |40 detachably connected to an annular member |4|, by means ofscrews |42, xed to theend of a stud shaft |43 rotatably supported on abracket |44. Sufficient clearance is provided between the right hand endof the feed screw 20 and the annular member |4| to permit removal of thefeed screw and the members |38 and |40 as a unit when the screws |36 and|42 have been removed without disturbing the bearings or brackets |29and |44. The foregoing construction permits quick replacement of thefeed screw when desired. The brackets |29 and |44 are secured by meansof bolts |45 to the brackets 39 and I6, respectively, and theconstruction is such that the feed screw 20 can be adjustedcircumferentially about the axis of the spindle B, a plurality of boltholes |46 being provided for this purpose, see Fig, 3.

The roller 24 which rolls the end of the work W against the mandrelafter it leaves the feed screw 20 is rotatably supported on a pin |50fixed in a forked lever |5|, and is provided with an annular flange |52which rolls or presses the tapered end of the work W into engagementwith or towards the adjacent convolution. The lever |5| is pivotallysupported on a pin |55 fixed in a. bracket |56 clamped to a rectangularbar |51 by bolts |58. The bar |51 is supported by brackesl |60 xed tothe brackets 39 and I6 b-y bolts The rear end |65 of the lever |5| iscircular in shape and engages a recess ina bearing member |66 supportedin a counterbore formed in a member |61. The member |61 is .in thenature of a piston and is slidably keyed within a cylindrical orcup-shaped member |68 clamped to the bar |51 by the bolts |58. The end|65 of the lever |5| is continuously held in contact with the bearingmember |66 by a spring member |10 supported by studs |1| fixed to themember |61 and extending over a pin |12 secured in the end |65 of thelever |5|.

The piston member |61 is continuously urged in an upward direction by acompression spring |13 compressed between the member |61 and a disk |14supported on the upper end of a tubular member |15 threaded into thebottom of the member |68. The compression of the spring |13 can beadjusted by rotating the tubular member |15, and the member |15 lockedin any adjusted position by a screw |16. The upward movement of thepiston member |61, and, in turn, the downward movement of the roller 24,is limited by a bolt |19 extending through the center of the member |61,the head of which overlies a portion of the member |51 underneath thebearing member |66. The lower end of the bolt |19 projects through thetubular member |15 and carries a nut |8| threaded onto the lower endthereof by means of which the upper limit of the member 61 can beadjusted. The roller assembly just described and which is designatedgenerally by vthe reference character D is adjustable along the bar |51to accommodate different lengths of springs. The compression of thespring |13 is adjusted by means of the tubular member |15 to take careof stock of different thickness, and the distance of the roller 24 fromthe axis of the spindle B is adjusted by the nut 8| to accommodate bothmandrels of different diameters and different size stock.

The motor 21 is a reversible three phase alternating current motor,provided with an electrically controlled brake applied to one end of thearmature shaft. The control box |86, see Fig. 1, houses the solenoidoperated control switch for the motor 21, designated in general bythe 5reference character K, see Fig. l0. The operating solenoid is indicatedat |81, and is in series with the foot operated push button |88, theoperating pedal |89 of which extends underneath the foot pedal 88 and isoperated simultaneously there- 10 with. The power lines are indicated bythe reference characters 4|, 42 and 43 and the motor terminal connectionby the reference characters T1, T2 and T3. Fuses are indicated at |90and ISI. The solenoid |92, which controls the opera- 15' tion of thebrake |85, is also in series with the push button |88. The constructionis such that the brake is released when the pedal 88 is depressed.

A limit switch, designated in general by the 20 reference character M,is provided for always bringing the spindle B to rest at a predeterminedpoint in the rotation thereof, The limit switch M comprises a framesupported by a member |96 attached to the bracket 38, see Fig. i, and a25.

shaft l 91 rotatably supported in the frame |95 by anti-frictionbearings |98. The shaft |91 is connected to the spindle shaft 26 by acoupling 200 and is rotated therewith. A plurality of insulator disks orcommutators 20|, adjustably conso nected to the shaft |91, carry contactsegments 282 on the circumference thereof embracing about 95% of thecircumference. 'I'he segments 202 are connected in series by a lead 203and contact is made with the segments by spring pressed 35 brushes 204slidably supported in insulating brush holders 205. The brushes 204 etc.are connected in shunt circuit with the push button |88 by the leads 201and 208 and maintain the circuit to the operating solenoids |81 and |92,after the pedal 40 88 is releasedk until a predetermined point in therotation of the spindle B, thus always stopping the spindle in apredetermined position. The disks or commutators 20| are adjustable onthe shaft |91 for the purpose of permitting the 45 spindle to be stoppedat different positions as desired. A manually operated switch 2|0 inseries with the commutator switch, permits the machine to be placedunder the sole control of the push button |88.

It is believed that the operation of the machine will be apparent fromthe foregoing description thereof, suffice it to say that with themachine at rest and the parts in the position shown in Fig.

7, the work, in the form of a predetermined length 55 of rod stocktapered off at both ends, is inserted underneath the feed screw 20 untilthe end thereof rests underneath the clamp bar 22, with the flat faceadjacent the face plate 95 of the clutch, after which the foot pedal 83is depressed to 50 clamp the end oi the work between the clamp bar 22and the mandrel 2|. When the foot pedal 88 is depressed the pedal 89 isdepressed simultaneously therewith, closing the switch |68, energizingthe solenoids |81 and |92, which start the motor 65 21 and release thebrake |85.

As the wire is coiled about the mandrel 2| the same is fed lengthwisethereof by the feed screw 20'. yAs the end Aof the coil is approachedthe work engages underneath the roller 24 which 70 rolls the free end ofthe work against the mandrel and presses the last convolution againstthe convolution adjacent thereto, thus gauging the length of the spring.When the coil has been completely formed on the mandrel the foot pedals'(5k 88 and 85 are released and the spindle B comes to stop at apredetermined point in the present Y illustration with the clamp bar 22on top. The

foot pedal |25 is then depressed, with the result that the slide 9| andthe mandrel 2| are moved to the right, as viewed in Fig. 1, strippingthe spring from the mandrel and allowing it to drop through the bottomof the machine. When the foot pedal |25 is released the slide 9| andmandrel 2| are returned to their initial position and the machine isready for the next operation.

The machine shown is set up for making right hand springs, but iscapable of making left hand springs by merely reversing the direction ofrotation of the motor 21, dropping the feed screw 20 until the topthereof Yis approximately even with the bottom of the mandrel 2|, andadjusting the limit switch M so that the Aspindle will stop with theclamp bar 22 underneath the mandrel. When operating the machine to makeleft hand springs, set up as outlined above, the work is inserted in themachine Vabove the feed screw 2|) and underneath the mandrel 2|.

From the foregoing it will be apparent that applicant has produced a newand improved machine for making springs, etc. While the preferredembodiment of the invention has been illustrated and described, I do notwish to be limited to the construction shown, which may be Varied withinthe scope of the invention, and I particularly point out and claim as myinvention the following:

1. In a machine of theV character describedy the combination of a frame,a mandrel adapted to have rod stock coiled thereabout to form a helicalcoil rotatably supported by said frame,

Vmeans for clamping one end of the rod stock into engagement'with saidmandrel, means for rotating said mandrel, means for engaging the rodstock projecting from said mandrel and limiting the rotation thereof,means for feeding the rod stock longitudinally of the mandrel, and fluidpressure actuated means for stripping the helical coil from saidmandrel.

2. In a machine of the character described, the combination of a frame,a spindle comprising a mandrel adapted to have rod stock coiledthereabout, a chuck carried by said spindle, said chuck comprising aclamp bar pivotally supported therein for clamping the rod stock inengagement with said mandrel, means for moving said clamp bar towardsand from said mandrel, means for rotating said spindle, a feed screwrotatably supported by said frame for preventing the rod stock not inengagement with said spindle from rotating therewith and for feeding therod stockV longitudinally of said mandrel, means forrotating said feedscrew, a roller supported by said frame' and addjustable longitudinallyof said mandrel for rolling the end of the rodV stock into contact withsaid mandrel after it has disengaged said feed screw.

3. In a Vmachine of the character described, the combination Vof aframe, a spindle rotatably supported by said frame, a mandrel rotatablysupported by said frame coaxial with said spindle, means for rotatingsaid spindle, meansfor operatively connecting said mandrel to saidspinin engagement with said mandrel, means for engaging the rod stocknot in contact with said mandrel and limiting the rotationV thereof withsaid mandrel, andmeans for feeding the rod stock longitudinally of saidmandrel to form aV same therewith, means supported by said spin-V dlefor clamping rod stock in engagement with said mandrel, means forengaging the rod stock not in contact with said mandrel and limiting therotation thereof with said mandrel, means for feeding the rod stocklongitudinally of said mandrel to form a helical coil, and means forrolling the end of the rod stock against said mandrel and stripping thecoil therefromV upon reciprocatlon of said mandrel in a direction awayfrom Said spindle. Y

5. In a machine of the character described, the combinationof a spindlecomprising a mandrel adapted to have rod stock coiled thereabout, meanscarried by said spindle for holding one end of the rod stock, anelectric motor for rotating said spindle, means for preventing rotationof the rod stock not engaged by the spindle about the axis thereof,means for feeding the rod stock longitudinally of the mandrel, andcontrol means for said motor operatively connected to said spindle foropening the circuit to said motor whereby said spindle is stopped in apredetercombination of a frame, a spindle rotatably sup- Y ported bysaid frame, a mandrel rotatably supportedV by said frame coaxial withsaid spindle, means for rotating said spindle, means: for stopping saidspindle in a predetermined position, means for operatively connectingsaid mandrel to said spindle, means for. reciprocating said mandrel toand from said spindle to engage and dlsengage the same therewith, meanssupported by said spindle for clamping rod stock in engagement with saidmandrel, ymeans for engaging the rod stock not in contact with saidmandrel and limiting the rotation thereof with said mandrel, means forfeeding the rod stock longitudinally of said mandrel as it is coiledthereabout to form a helical coil, and common means for rolling the endof the rod stock against said mandrel and stripping the coil from saidmandrel upon reciprocation th'ereof in a direction away from saidspindle. f

7. In a machine of the character described the combination of a frameaspindle rotatably sup-V ported by said frame, a member slidably sup'-ported by said frame,V a mandrel rotatably Ysupported by said membercoaxial with said spindle, means for rotating said spindle, means foroperatively connecting said mandrel to said spindle, means fluidpressure actuated for reciprocating said member for moving said mandrelto and from said spindle to engage and vdisengage the same therewith,means supported by said spindle for clamping rod stock in engagementwith said mandrel, and means for feeding the rod stock longitudinally ofsaid mandrel to form a Vhelical coil.

po-rted by said frame, an electric motor for rotating said spindle,means for operatively connect- 8. In a machineof the character describedthe y combination of a frame, a spindle rotatably supe,

ing said spindle and said motor, a limit switch operatively connected tosaid spindle for controlling the circuit to said motor whereby saidspindle is stopped in a predetermined position, a bracket slidablysupported by said frame, a mandrel rotatably supported in said bracketcoaxial with said spindle about which rod stock is adapted to be coiledto form a spring, means for operatively connecting said spindle withsaid mandrel whereby said mandrel is rotated therewith, means forreciprocating said bracket towards and from said spindle to engage anddis- Y engage said mandrel with said spindle, means for clamping rodstock adjacent said mandrel, and means for limiting the rotation of therod stock not in engagement with said mandrel from rotating therewith.

9. In a machine of the character described the combination of a frame, aspindle rotatably supported by said frame, an electric motor forrotating said spindle, a. gear reduction for operatively connecting saidmotor with said spindle, a manually controlled switch for closing thecircuit to said motor, control means for said motor operativelyconnected to said spindle for interrupting the circuit to said motorafter the opening of said manually controlled switch and stopping saidspindle in a predetermined position, a member slidably supported by saidframe, a mandrel rotatably supported by said member coaxial with saidspindle, means for detachably connecting said mandrel with said spindlewhereby said mandrel is rotated with said spindle, a iiuid pressureoperated means for moving said member relative to said frame to engageand disengage said mandrel with said spindle, a chuck supported by saidspindle adjacent said mandrel, a clamp bar supported by said chuck forclamping one end of rod stock in contact with said mandrel, fluidpressure actuated means for controlling the actuation of said clamp bar,means for connecting said clamp bar with said iiuid pressure actuatedmeans, a feed screw rotatably supported by said frame ad- 5 jacent saidmandrel for preventing the free end of the rod stock from rotating withsaid mandrel and for feeding the rod stock longitudinally thereof, meansfor adjusting said feed screw circumferentially of the axis of saidspindle, means l0 forI rotating said feed screw for said spindle, aroller member rotatably supported adjacent said mandrel for rolling thefree end of the rod stock into contact with said mandrel, yieldablemeans for continuously urging said roller member tol5 wards saidmandrel, an adjustable stop for limiting the movement o-f said rollermember towards said mandrel, and means for adjusting said rollerlongitudinally of the axis of said mandrel.

10. In a machine of the character described 20 the combination of aframe, a spindle rotatably supported by said frame, a mandrel rotatablysupported by said frame, means for rotating said mandrel, means foroperatively connecting said mandrel to said spindle, iiuid pressureactuated means for moving said mandrel towards and from said spindle toengage and disengage the same therewith, means supported by said spindlefor clamping rod stock in engagement with said mandrel, means forengaging the rod stock not in contact with said mandrel and limiting therotation thereof, means for feeding the rod stock longitudinally of saidmandrel as it is coiled thereabout, means for rolling the end of the rodstock against said mandrel, and means for stripping the rod stock fromsaid mandrel upon movement of the mandrel away from said spindle.

JOSEPH GOGAN.

